| Zip Code | City | Population ↓ |
|---|---|---|
| 30127 | Powder Springs | 71,642 |
| 30062 | Marietta | 62,958 |
| 30101 | Acworth | 62,284 |
| 30066 | Marietta | 60,795 |
| 30144 | Kennesaw | 58,836 |
| 30080 | Smyrna | 53,116 |
| 30064 | Marietta | 50,997 |
| 30067 | Marietta | 46,595 |
| 30152 | Kennesaw | 43,865 |
| 30126 | Mableton | 42,865 |
| 30060 | Marietta | 39,125 |
| 30008 | Marietta | 34,331 |
| 30339 | Atlanta | 34,292 |
| 30068 | Marietta | 33,866 |
| 30082 | Smyrna | 26,080 |
| 30168 | Austell | 24,599 |
| 30106 | Austell | 23,977 |
| 30111 | Clarkdale | 0 |
| 30090 | Marietta | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 19 ZCTAs in Cobb County, Georgia (US Census).